i changes my light edge cover for the 505 with the light cover for the 600.
i love it to read in the dark, but the edge cover without the light edge is more comfortable, than the one with the goos neck for the 600.

Thank you for mentioning. I'm getting my M-Edge cover for my Sony 600 next week, I can't wait!!! I hope it goes over as well as yours has!

I have the Sony cover and I ended up getting an M-Edge cover over Christmas...something about it is so appealing I find myself stroking it and patting it like it is a new pet. Never felt that way about the Sony cover I hope you got the light too because it is definitely superior to the Sony one.

I like that Hard Cover for the PRS 900. It totally protects the eReader from any damage. It is a cushioned case which can be opened by zipper for reading and has elastic restraints so it doesn't fall out. The standard soft cover must be removed to use the Hard Cover.

The only problem is that one cannot reach the power button. The simple work around is to turn off Power Management and leave the unit on all the time when away from the house where I read with a PC.

When home I just shut down the unit and it uses NO power. While away from the house, it uses minimal power except if turning pages.

I would never go back to a standard cover once getting used to this Hard Cover with cushions.